A sample of blood to be tested for the presence of biological activity is added to a suitable growth medium which includes a C.sup.14 containing carbon source fermentable to produce gaseous C.sup.14 O.sub.2. After a suitable incubation period, a portion of the gaseous atmosphere above the medium is analyzed for the presence of radioactivity. In the improvement herein described, mammalian cells in the blood sample are lysed in order to reduce background reading when the radioactivity is measured ...

A carbon activity meter utilizing an electrochemical carbon cell with gaseous reference electrodes having particular application for measuring carbon activity in liquid sodium. The electrolyte container is electroplated with a thin gold film on the inside surface thereof, and a reference electrode consisting of CO/CO.sub.2 gas is used.

The anti-depressant activity of 2,3,5,6-tetrahydro-6-phenylimidazo[2,1-b]thiazole and acid addition salts thereof.

An activity device for animals of rodent variety, the device comprising a revolvable drum and a housing commonly supported so as to permit rotation of the drum relative to the housing as an animal moves along the interior of the drum.

A sample of blood to be tested for the presence of biological activity is added to a suitable growth medium which includes C.sup.14 containing carbon source fermentable to produce gaseous C.sup.14 O.sub.2. After a suitable incubation period, a portion of the gaseous atmosphere above the medium is analyzed for the presence of radioactivity. In the improvement herein described, a growth medium containing at least about 5 percent by weight of a material selected from the group consisting of sucrose...

An activity toy includes a base with an upper surface that has recessed regions. Elements are positionable in each recessed region. Positioning an element in each recessed region produces a sound. For instance, the sound may be a combination of sounds when more than one element is position in the recesses or a verse of a song that is associated with an element. In addition, the base may be a toy vehicle, with the recesses defining positions in the vehicle. The sound may depend on the position of...

An apparatus for an a method of closing a fixed gap in an activity surface such as a turfed race-track is described. The apparatus comprises a movable turf tray having an upper surface with the same characteristics as the activity surface and means for guiding the tray into the gap so as to wedge the tray releasably in the gap and thereby to provide a substantially continuous activity surface. The apparatus can be used to provide a reconfigurable racetrack crossing with the permanent road gap in...

An activity device includes a housing, at least one interactive feature, and a rotatable container mounted on the housing. The container, which is capable receiving accessories, includes an outer wall and an inner wall that define a cavity therebetween. At least one of the inner or outer walls may be transparent. The cavity is configured to hold a fluid with objects dispersed therein. The rotation of the container about its axis causes agitation of the liquid medium and engages an actuator coupl...

This invention relates to methods of screening compounds that modulate cellular and organismal processes by modification of the activity of SIR2 and/or transcription factors, e.g., p53, particularly methods of screening for compounds that modify lifespan and/or metabolism of a cell or an organism by modulation of the activity of SIR2 and/or transcription factors, e.g., p53, and more particularly to methods of screening for compounds that modulate the activity of Sir2 and/or transcription factors...

An activity monitor is provided that corrects for the effects of motion external to the entity being monitored. For example, the activity monitor can overcome the effects of vehicular travel.